Chaeles henry jacot



(No Model.)

0. H. J AGOT.

AUTOMATIC SAFETY CHECK FOR MUSICAL BOXES.

No. 337,585., Patented Mar. 9, 1886.

WITNESSES ATTORNEYS.

; UNITED STATES P TENT EricE.

- CHARLES HENRYJAGOT, or HOBOKEN, NEW JERSEY.

AUTOMATIC SAFETY-CHECK F'OR MUSICAL BOXES. I

SPECIFICATION forming part of Letters Patent No. 337,585, dated March 9,1886.

Application filed September 12, 1885. Serial No. 176,913. (No model.)

To aZZ whom it may concern.-

Be it known that I, CHARLES HENRY J AC'OT, of Hoboken, Hudson county,and State ofNew Jersey, have invented a new and useful Improvement inAutomatic SafetyOhecks for Music-Boxes, of which the following is afull, clear, and exact description.

Reference is to be had to the accompanying drawings,forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is aplan view of apart of a musicbox to which my improvementhas been applied, part being broken away. Fig. 2 is an end elevation ofthe same, part being broken away. Fig. 3 is an end elevation of a partof the same, showing a modification.

The object of this invention is to provide automatic safety-checks formusic-boxes, constructed in such a manner as to stop and hold thecylinders should they escape from the control of the escapements byaccident, or when the said escapements are being adjusted ordisconnected, to prevent the cylinders from being revolved so rapidly bythe spring as to expose the cylinder pins and the teeth of the combs tothe danger of being broken or otherwise injured.

The invention consists in the combination, with the cylinder-shaft of amusic-box, of a friction-wheel and a balanced friction-pawl, whereby thesaid shaft will be stopped and held should its speed be undulyincreased.

A represents the bed-plate. B is the drum, containing the driving-spring0, attached to the said drum and to the shaft D, which revolves inbearings attached to the bed-plate A, and which is turned to wind up thesaid spring by a crank, E, working loose upon the shaft D, and connectedtherewith by a pawl, F, pivoted to the said crank and engaging with aratchet-wheel, G, attached to the said shaft, so that the said crankinits forward movement will carry the said shaft with it, but can beturned back without turning the shaft.

To the drum B is attached a large gearwheel, H, the teeth of which meshinto the teeth of the pinion-wheel I, attached to the shaft J. The shaftJ revolves in bearings attached to the bedplate A, and upon it is placedthe cylinder K, to which are attached the pins L, that operate the teethof the comb M,attached to the bed-plate A. To the other end of the shaftJ is attached a large gearwheel, N, which is connected by a train ofgear-wheels, O, with and drives the escapementfans P, thatcontrol thespeed of the mechanism.

The shaft J is made to carry the cylinderK with it in its revolution bya pin, Q, attached to the gear-wheel N, and which enters a perforationin the end of the said cylinder.

'To the inner side of the gear-wheel N is pivoted a small wheel, B,having upon its side as many inclines or shoulders as the instrument isconstructed to play airs, and against which rests an inclinedprojection, S, attached to the end of the cylinder K, so that the saidcylinder can be adjusted to change from one air to another by turningthe said wheel.

The mechanism for turningthe wheel R is not shown in the drawings,asthere is nothing new in its construction or operation.

The cylinder K is held forward, holding the projection S against anincline of the wheelR by a spiral spring,T, placed upon the shaft J, andinterposed between the end of the cylinder K and the pinion-wheel I.

In the outer side of the gear-wheel N, near its rim, is formed anannular groove, U, having a recess, V, in the shoulder at its innerside. To the bearings of the fan-driving gearwheels 0, or other suitablesupport, is pivoted the three-armed lever WV,one arm of which isprovided with a laterally-projecting pin, X, which enters the groove U,and at each revolution of the cylinder K, and consequently at thecompletion of each air, drops into the re cess V and stops the movementof the said cylinder. The second arm of the leverWprojects into such aposition that the slight rise of the said arm caused by the dropping ofthe pin X into the recess V will cause the said arm to engage with aradial pin, Y, attached to the shaft of the fans P, and thus stop thesaid fans.

Z is a spring attached to the fan-shaft bearing or other supp0rt,andwhich presses against an arm of the lever WV in such a direction as tocause the pin X to drop into the recess V, when the revolution of thegear-wheel N brings the said recess opposite the said pin. I

The third arm of the lever W projects downward, and is bent outward intosuch a posiin the construction or operation of the mechanism.

To the outer side of the gear-wheel N, or to the cylindershaft J, isattached or upon it is formed a friction-wheel, b, to the outer side ofwhich, near its rim, is attached a circle of pins, 0. To the bearing forthe shaft J or other suitable support is journaled a frictionpawl, d,the face of which is made with an eccentric curve, as shown in Fig. 2,or incline, as shown in Fig. 3, so as whenthrown forward to engage withthe face of the friction-wheel b, and thus stop and hold the cylinder K.

To the side of the friction-pawl dis attached or upon it is formed anarm, 6, which projects along the side of the friction-wheel b into sucha position as to be struck by the successive pins 0, so as to swing thefriction-pawl d forward, the said arm being made of such alength thatthe said pins 0 will release it before the face of the pawl (1 comes incontact with the face of the wheel I).

The rear end of the pawl d is made sufficiently heavy to raise theforward end into its former position when the arm 6 escapes from eachpin a; or the friction-pawl d can be supported by a spring, f, to whichit is attached, and which is secured to a projection, 9, formed upon orattached to the bed-plate A, the said spring yielding when the pawl dislowered by the engagement of a pin 0 with the arm e,

and again raising the said pawl whenthe said arm is released from thesaid pin.

The friction-pawl d can be provided with a handle, h, for convenience inwithdrawing it from the friction-wheel b, when desired.

With this construction, when the, mechanism is running at its ordinaryspeed, each pin a strikes the arm 6 of the pawl 01, and swings the saidpawl forward, but releases it before its face comes in contact with theface of the friction-wheel b, when the said pawl is instantly returnedto its former position; but should the cylinder escape from the controlof the fan-escapement the rapid movement of the said cylinder will givesuch a momentum to the pawl d in its forward movement as to bring theface of the said pawl into contact with the face of thefriction-wheel 1) before the said pawl can return to its formerposition, and the cylinder will be stopped and held until the said pawlis withdrawn from the said friction-wheel.

Having thus fully described my invention, I claim as newand desire tosecure by Letters Patentlhe combination, with the cylinder-shaft of amusic-box, of a friction-wheel, b, having a.

circle of pins, 0, and a balanced friction-pawl, at, having arm e,substantially as herein shown and described, whereby the said shaft willbe stopped and held should its speed be unduly increased, as set forth.

CHARLES HENRY JAOOT'.

\Vitnesses:

JAMES T. GRAHAM, EDGAR TATE.

